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<head>
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    <script src="../libraries/RGraph.common.dynamic.js" ></script>
    <script src="../libraries/RGraph.bar.js" ></script>
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    <title>A bar chart with horizontal gradients</title>
    
    <link rel="stylesheet" href="demos.css" type="text/css" media="screen" />
    
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    <meta name="description" content="A regular Bar chart but with horizontal gradients that are tailored to each individual bar" />
    
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<body>

    <h1>A bar chart with horizontal gradients</h1>
    
    <p>
        This bar chart draws the chart then uses the coordinates of the bars to create gradients (each is specific to a bar),
        changes the colors to the gradients and finally redraws the chart.
    </p>

    <canvas id="cvs" width="600" height="250">[No canvas support]</canvas>
    <script>
        $(document).ready(function ()
        {
            var bar = new RGraph.Bar({
                id: 'cvs',
                data: [4,8,5,3,4,6,8],
                options: {
                    labels: ['Mon','Tue','Wed','Thu','Fri','Sat','Sun'],
                    colors: {
                        sequential: true
                    },
                    shadow: {
                        color: '#999',
                        offsetx: 0,
                        offsety: 0,
                        blur: 15
                    },
                    strokestyle: 'rgba(0,0,0,0)'
                }
            }).draw()


            /**
            * Now the chart has been drawn use the coords to create some appropriate gradients
            */
            var colors = [];

            for(var i=0; i<bar.coords.length; ++i) {
                // Because it's a horizontal gradient the Y coords don't matter
                var x1 = bar.coords[i][0];
                var y1 = 0;
                var x2 = bar.coords[i][0] + bar.coords[i][2];
                var y2 = 0;
                
                colors[i] = RGraph.linearGradient(bar, x1, y1, x2, y2, '#c00','red');
            }
    
            bar.set('colors', colors);
            RGraph.clear(bar.canvas);
            RGraph.redraw();
        })
    </script>

    <p>
        <a href="./">&laquo; Back</a>
    </p>

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